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"""Test file descriptor operations
Made for Jython.
"""
import errno
import os
import sys
import tempfile
import test.test_support as test_support
import unittest
class TestFilenoTestCase(unittest.TestCase):
def setUp(self):
self.filename = tempfile.mktemp()
self.fp = open(self.filename, 'w+')
self.fd = self.fp.fileno()
def tearDown(self):
if self.fp:
self.fp.close()
os.remove(self.filename)
def test_ftruncate(self):
self.fp.write('jython filenos')
self.fp.flush()
os.fsync(self.fd)
self.assertEqual(os.path.getsize(self.filename), 14)
os.ftruncate(self.fd, 8)
self.assertEqual(os.path.getsize(self.filename), 8)
os.ftruncate(self.fd, 0)
self.assertEqual(os.path.getsize(self.filename), 0)
self.fp.close()
raises(IOError, 9, os.ftruncate, self.fd, 0)
def test_lseek(self):
self.assertEqual(os.lseek(self.fd, 0, 1), 0)
os.write(self.fd, 'jython filenos')
os.lseek(self.fd, 7, 0)
self.assertEqual(os.read(self.fd, 7), 'filenos')
self.fp.close()
raises(OSError, 9, os.lseek, self.fd, 0, 1)
def test_read(self):
self.fp.write('jython filenos')
self.fp.flush()
self.fp.seek(0)
result = os.read(self.fd, 7)
self.assertTrue(isinstance(result, str))
self.assertEqual(result, 'jython ')
self.assertEqual(os.read(self.fd, 99), 'filenos')
self.fp.close()
raises(OSError, 9, os.read, self.fd, 1)
def test_write(self):
os.write(self.fd, 'jython filenos')
self.fp.seek(0)
self.assertEqual(self.fp.read(), 'jython filenos')
self.fp.close()
raises(OSError, 9, os.write, self.fd, 'The Larch')
class TestOsOpenTestCase(unittest.TestCase):
def setUp(self):
self.filename = tempfile.mktemp()
self.dir = None
self.fd = None
def tearDown(self):
if self.fd:
try:
os.close(self.fd)
except:
pass
if os.path.exists(self.filename):
os.remove(self.filename)
if self.dir:
os.rmdir(self.dir)
def test_open(self):
# XXX: assert the mode of the file
self.fd = os.open(self.filename, os.O_WRONLY | os.O_CREAT)
self.assert_(os.path.exists(self.filename))
os.write(self.fd, 'jython')
os.close(self.fd)
self.fd = os.open(self.filename, os.O_WRONLY | os.O_APPEND)
os.write(self.fd, ' filenos')
os.close(self.fd)
fp = open(self.filename)
self.assertEquals(fp.read(), 'jython filenos')
fp.close()
# falls back to read only without O_WRONLY/O_RDWR
self.fd = os.open(self.filename, os.O_APPEND)
raises(OSError, 9, os.write, self.fd, 'new')
# Acts as append on windows (seeks to the end)
os.lseek(self.fd, 0, 0)
self.assertEquals(os.read(self.fd, len('jython filenos')), 'jython filenos')
os.close(self.fd)
# falls back to read only without O_WRONLY/O_RDWR
self.fd = os.open(self.filename, os.O_CREAT)
raises(OSError, 9, os.write, self.fd, 'new')
self.assertEquals(os.read(self.fd, len('jython filenos')), 'jython filenos')
os.close(self.fd)
# interpreted as RDWR
self.fd = os.open(self.filename, os.O_RDONLY | os.O_RDWR)
os.write(self.fd, 'test')
os.lseek(self.fd, 0, 0)
self.assertEquals(os.read(self.fd, 4), 'test')
os.close(self.fd)
def test_open_truncate(self):
fp = open(self.filename, 'w')
fp.write('hello')
fp.close()
self.assertEquals(os.path.getsize(self.filename), 5)
self.fd = os.open(self.filename, os.O_TRUNC | os.O_RDWR)
self.assertEquals(os.path.getsize(self.filename), 0)
os.write(self.fd, 'truncated')
os.lseek(self.fd, 0, 0)
self.assertEquals(os.read(self.fd, len('truncated')), 'truncated')
os.close(self.fd)
self.fd = os.open(self.filename, os.O_TRUNC | os.O_WRONLY)
self.assertEquals(os.path.getsize(self.filename), 0)
os.write(self.fd, 'write only truncated')
raises(OSError, 9, os.read, self.fd, 99)
os.close(self.fd)
fd = open(self.filename)
self.assertEquals(fd.read(), 'write only truncated')
fd.close()
# Both fail on Windows, errno 22
"""
# falls back to read only without O_WRONLY/O_RDWR, but truncates
self.fd = os.open(self.filename, os.O_TRUNC)
self.assertEquals(os.path.getsize(self.filename), 0)
raises(OSError, 9, os.write, self.fd, 'new')
self.assertEquals(os.read(self.fd, 99), '')
os.close(self.fd)
fp = open(self.filename, 'w')
fp.write('and ')
fp.close()
self.assertEquals(os.path.getsize(self.filename), 4)
# append with no write falls back to read, but still truncates
self.fd = os.open(self.filename, os.O_TRUNC | os.O_APPEND)
self.assertEquals(os.path.getsize(self.filename), 0)
raises(OSError, 9, os.write, self.fd, 'new')
os.close(self.fd)
fp = open(self.filename, 'w')
fp.write('and ')
fp.close()
self.assertEquals(os.path.getsize(self.filename), 4)
"""
def test_open_exclusive(self):
self.assert_(not os.path.exists(self.filename))
# fails without O_CREAT
raises(OSError, (2, self.filename), os.open, self.filename, os.O_EXCL)
self.assert_(not os.path.exists(self.filename))
# creates, read only
self.fd = os.open(self.filename, os.O_EXCL | os.O_CREAT)
self.assert_(os.path.exists(self.filename))
raises(OSError, 9, os.write, self.fd, 'jython')
self.assertEquals(os.read(self.fd, 99), '')
os.close(self.fd)
# not exclusive unless creating
os.close(os.open(self.filename, os.O_EXCL))
raises(OSError, (17, self.filename),
os.open, self.filename, os.O_CREAT | os.O_EXCL)
raises(OSError, (17, self.filename),
os.open, self.filename, os.O_CREAT | os.O_WRONLY | os.O_EXCL)
raises(OSError, (17, self.filename),
os.open, self.filename, os.O_CREAT | os.O_RDWR | os.O_EXCL)
os.remove(self.filename)
self.fd = os.open(self.filename, os.O_EXCL | os.O_RDWR | os.O_CREAT)
os.write(self.fd, 'exclusive')
os.lseek(self.fd, 0, 0)
self.assertEquals(os.read(self.fd, len('exclusive')), 'exclusive')
def test_open_sync(self):
if not hasattr(os, 'O_SYNC'):
return
# Just ensure this works
self.fd = os.open(self.filename, os.O_SYNC | os.O_WRONLY | os.O_CREAT)
self.assert_(os.path.exists(self.filename))
os.write(self.fd, 'jython')
raises(OSError, 9, os.read, self.fd, 99)
os.close(self.fd)
os.remove(self.filename)
self.fd = os.open(self.filename, os.O_SYNC | os.O_RDWR | os.O_CREAT)
self.assert_(os.path.exists(self.filename))
os.write(self.fd, 'jython')
os.lseek(self.fd, 0, 0)
self.assertEquals(os.read(self.fd, len('jython')), 'jython')
os.close(self.fd)
def test_open_sync_dir(self):
if not hasattr(os, 'O_SYNC'):
return
self.dir = tempfile.mkdtemp()
try:
self.fd = os.open(self.dir, os.O_SYNC | os.O_RDWR)
except OSError, ose:
assert ose.errno == errno.EISDIR, ose.errno
def test_bad_open(self):
for mode in (os.O_WRONLY, os.O_WRONLY, os.O_RDWR):
raises(OSError, (2, self.filename), os.open, self.filename, mode)
open(self.filename, 'w').close()
raises(OSError, (22, self.filename),
os.open, self.filename, os.O_WRONLY | os.O_RDWR)
class TestOsFdopenTestCase(unittest.TestCase):
def setUp(self):
self.filename = tempfile.mktemp()
self.fd = None
def tearDown(self):
if self.fd:
try:
os.close(self.fd)
except:
pass
if os.path.exists(self.filename):
os.remove(self.filename)
def test_fdopen(self):
origw_fp = open(self.filename, 'w')
origw = origw_fp.fileno()
origr_fp = open(self.filename, 'r')
origr = origr_fp.fileno()
# Mode must begin with rwa
raises(ValueError, "invalid file mode 'b'",
os.fdopen, origr, 'b')
# Refuse modes the original file doesn't support
# XXX: allowed on windows CPython
"""
raises(OSError, '[Errno 22] Invalid argument',
os.fdopen, origw, 'r')
raises(OSError, '[Errno 22] Invalid argument',
os.fdopen, origr, 'w')
"""
fp = os.fdopen(origw, 'w')
fp.write('fdopen')
# Windows CPython doesn't raise an exception here
#raises(IOError, '[Errno 9] Bad file descriptor',
# fp.read, 7)
fp.close()
fp = os.fdopen(origr)
self.assertEquals(fp.read(), 'fdopen')
# Windows CPython raises IOError [Errno 0] Error
#raises(IOError, '[Errno 9] Bad file descriptor',
# fp.write, 'test')
raises(IOError, None,
fp.write, 'test')
fp.close()
# Windows CPython raises OSError [Errno 0] Error for both these
#raises(OSError, '[Errno 9] Bad file descriptor',
# os.fdopen, origw, 'w')
#raises(OSError, '[Errno 9] Bad file descriptor',
# os.fdopen, origr, 'r')
raises(OSError, None,
os.fdopen, origw, 'w')
raises(OSError, None,
os.fdopen, origr, 'r')
# These all raise IO/OSErrors on FreeBSD
try:
origw_fp.close()
except:
pass
try:
origr_fp.close()
except:
pass
try:
os.close(origw)
except:
pass
try:
os.close(origr)
except:
pass
def raises(exc, expected, callable, *args):
"""Ensure the specified call raises exc.
expected is compared against the exception message if not None. It
can be a str, an errno or a 2 item tuple of errno/filename. The
latter two being for comparison against EnvironmentErrors.
"""
if expected:
if isinstance(expected, str):
msg = expected
else:
errno = expected[0] if isinstance(expected, tuple) else expected
msg = '[Errno %d] %s' % (errno, os.strerror(errno))
if isinstance(expected, tuple):
msg += ': %r' % expected[1]
try:
callable(*args)
except exc, val:
if expected and str(val) != msg:
raise test_support.TestFailed(
"Message %r, expected %r" % (str(val), msg))
else:
raise test_support.TestFailed("Expected %s" % exc)
def test_main():
test_support.run_unittest(TestFilenoTestCase,
TestOsOpenTestCase,
TestOsFdopenTestCase)
if __name__ == '__main__':
test_main()
|
